﻿// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
// Copyright (c) 2011, Dr. Masroor Ehsan
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the author nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// $Author: masroore@gmail.com $
// $Id: BrokerCommission.cs 37 2011-10-21 15:00:21Z masroore@gmail.com $
// $Rev: 37 $
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

using CuttingEdge.Conditions;

namespace MaxTrader.BusinessObjects
{
    public class BrokerCommission : IBrokerCommission
    {
        public BrokerCommission(decimal rate) : this(rate, 0m, 0m, 0m)
        {
        }

        public BrokerCommission(decimal variableRate, decimal fixedAmount, decimal maximumAmount, decimal minimumAmount)
        {
            Condition.Requires(variableRate).IsGreaterOrEqual(0);
            Condition.Requires(fixedAmount).IsGreaterOrEqual(0);
            Condition.Requires(maximumAmount).IsGreaterOrEqual(0);
            Condition.Requires(minimumAmount).IsGreaterOrEqual(0);

            CommissionRate = variableRate;
            FixedCommission = fixedAmount;
            MaximumCommission = maximumAmount;
            MinimumCommission = minimumAmount;
        }

        public virtual decimal MaximumCommission { get; protected set; }

        public virtual decimal MinimumCommission { get; protected set; }

        public virtual decimal CommissionRate { get; protected set; }

        public virtual decimal FixedCommission { get; protected set; }

        #region IBrokerCommission Members

        public decimal CalculateExpenses(Contract contract)
        {
            Condition.Requires(contract, "contract").IsNotNull();
            Condition.Requires(contract.Total, "Total").IsGreaterThan(0);

            var commission = FixedCommission + ((contract.Total*CommissionRate)/100m);

            Condition.Ensures(commission, "commission").IsGreaterOrEqual(0);

            if (commission > MaximumCommission)
            {
                return MaximumCommission;
            }

            if (commission < MinimumCommission)
            {
                return MinimumCommission;
            }

            return commission;
        }

        #endregion
    }
}